Ink ribbon cassette



FIG. 1 is a perspective view of the front, bottom and right side of anink ribbon cassette showing our new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a right side elevational view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The broken lines depict environmental subject matter only and form nopart of the claimed design.

The ornamental design for an ink ribbon cassette, as shown anddescribed.